|Year|Title|Role|Notes|
|---|---|---|---|
|1995|Polio Water|Diane|Short film|
|1996|New York Crossing|Drummond|Television film|
|1997|Lawn Dogs|Devon Stockard||
|1999|Pups|Rocky||
|1999|Notting Hill|12-Year-Old Actress||
|1999|The Sixth Sense|Kyra Collins||
|2000|Paranoid|Theresa||
|2000|Skipped Parts|Maurey Pierce||
|2000|Frankie & Hazel|Francesca 'Frankie' Humphries|Television film|
|2001|Lost and Delirious|Mary 'Mouse' Bedford||
|2001|Julie Johnson|Lisa Johnson||
|2001|Tart|Grace Bailey||
|2002|A Ring of Endless Light|Vicky Austin|Television film|
|2003|Octane|Natasha 'Nat' Wilson||
|2006|The Oh in Ohio|Kristen Taylor||
|2007|Closing the Ring|Young Ethel Ann||
|2007|St Trinian's|JJ French||
|2007|Virgin Territory|Pampinea||
|2008|Assassination of a High School President|Francesca Fachini||
|2009|Walled In|Sam Walczak||
|2009|Homecoming|Shelby Mercer||
|2010|Don't Fade Away|Kat||
|2011|You and I|Lana||
|2012|Into the Dark|Sophia Monet||
|2012|Ben Banks|Amy||
|2012|Apartment 1303 3D|Lara Slate||
|2012|Cyberstalker|Aiden Ashley|Television film|
|2013|Bhopal: A Prayer for Rain|Eva Gascon||
|2013|A Resurrection|Jessie|Also producer|
|2013|L.A. Slasher|The Actress||
|2013|Gutsy Frog|Ms. Monica|Television film|

Question: in what year did barton appear in the most films?
Answer: 2013